diff --git a/boards/gd32e103v_eval.json b/boards/gd32e103v_eval.json
index 5b50bb7..11956af 100644
--- a/boards/gd32e103v_eval.json
+++ b/boards/gd32e103v_eval.json
@@ -28,8 +28,9 @@
     "upload": {
         "maximum_ram_size": 32768,
         "maximum_size": 131072,
-        "protocol": "stlink",
+        "protocol": "cmsis-dap",
         "protocols": [
+            "cmsis-dap",
             "jlink",
             "stlink",
             "blackmagic",
diff --git a/boards/gd32e103vb_mbed.json b/boards/gd32e103vb_mbed.json
index 467c654..f3b6e41 100644
--- a/boards/gd32e103vb_mbed.json
+++ b/boards/gd32e103vb_mbed.json
@@ -30,8 +30,9 @@
     "upload": {
         "maximum_ram_size": 32768,
         "maximum_size": 131072,
-        "protocol": "stlink",
+        "protocol": "cmsis-dap",
         "protocols": [
+            "cmsis-dap",
             "jlink",
             "stlink",
             "blackmagic",